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A202912 Number of nX4 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 1

%I #5 Mar 31 2012 12:36:52

%S 372,1194376,2397172032,4062408076312,7102116597811456,

%T 12637286590945269232,22397115742156661223732,

%U 39623544474309263600520384,70135184984660134580990756160,124165374720618520973688261347828

%N Number of nX4 0..7 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor

%C Column 4 of A202916

%H R. H. Hardin, <a href="/A202912/b202912.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..2..6..5..5....7..2..1..3....2..2..0..1....1..7..2..5....3..5..6..7

%e ..5..6..2..7....7..6..2..3....5..0..7..4....1..7..1..5....1..3..0..7

%e ..4..5..2..7....7..2..2..7....5..6..7..7....4..2..0..3....7..3..0..4

%e ..0..0..3..3....1..1..2..7....3..0..3..4....4..0..2..2....7..3..7..7

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 26 2011

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Last modified April 19 11:31 EDT 2024. Contains 371792 sequences. (Running on oeis4.)